Drawing a logarithmic histogram

I'm trying to plot a histogram on some data that I receive at runtime.
I'm trying to measure distances between two points, and these distances
can be from the range 1 to 5000000. I want to use a logarithmic scale
with a range -2^29 to +2^29. How can I determine at any point in time
which strata (i.e which cohort or portion of scale) the value belongs to
(without using the square or square-root functions)?

I could have mask-bits of all possible scales, such as 2^2, 2^3, 2^4
upto 2^29 and AND each of these with the value to figure this out but is
there a cleaner way of doing this?

Advertisements

"Andre" <> wrote in message
news:...
> I'm trying to plot a histogram on some data that I receive at runtime.
> I'm trying to measure distances between two points, and these distances
> can be from the range 1 to 5000000. I want to use a logarithmic scale
> with a range -2^29 to +2^29. How can I determine at any point in time
> which strata (i.e which cohort or portion of scale) the value belongs to
> (without using the square or square-root functions)?

Log graphs will not have negative numbers in the range ( or is it domain?).

Maybe you meant 2**(-29). (Note that the ^ operator has a different meaning
in C.)

I would think that log() would be useful. If more than one dimension, you
would also want sqrt().

Share This Page

Welcome to The Coding Forums!

Welcome to the Coding Forums, the place to chat about anything related to programming and coding languages.

Please join our friendly community by clicking the button below - it only takes a few seconds and is totally free. You'll be able to ask questions about coding or chat with the community and help others.
Sign up now!